Attachment for drop-hammers.



PATENTED APR. ll, 1905.

R. F. MASSA.

ATTACHMENT FOR DROP HAMMERS.

APPLIOATION FILED 00T. 22, 1904.

2 SHEETS-SHEET l.

No. 787,339. PATENTRD APR. 11, 1905.

R. T. MASSA. ATTACHMENT TOR DROP RAMMRRS.

APPLIOTION FILED 00T. 22, 1904.

2 SHEETS-SHEET 2.

am, '5g MW NTTED STATES Patented April 11, 1905.

ATENT FFICE.

ATTACHMENT FOR DROP-HAIVIIVIEHS.

SPECIFICATION formingpar't of Letters Patent NO. 787,339, dated April 11, 1905.

Application tiled October 22,1904. Serial No. 229,539.

particularly to tools of that class used to.`

straighten or re-torm articles placed upon the anvil hy the hand ot' the operator and then struck by the descending' hammer.

3 rlhe objectot' the invention is to provide improved means for ejecting' the article being' operated upon a t'ter the hammer has descended and while it is being' raised to itssuspended position.

O lt consists ot' the mechanism illustrated by the drawings and more particularlydescribed in the specilication.

In the drawings, Figure 1 represents a front elevation ot' a common form ot' drop-hammer with the electing' device attached. Fig'. Q is a side elevation1 partly in section, ot' Fig'. I, showing' the hammer in its suspended position. Fig'. is the same as Fig'. 2, with the hammer down; and Fig'. I is a cross-section O ot' Fig'. l above the anvil.

Like numerals represent like parts throug'hout the various views.

I represents the base ot' the machine, and Q and 2 are the side standards, 'forming' guides t'or the hammer 3.

l is the usual driving-jack, connected to the hammer 3 by means ot' the lifting-ropes The foregoing' may be any ot' the preferred Forms ot' drop-hammer construction and forms O no part ot my invention.

Near the upper end of one ot' the g'uidestandards there pivoted a depending' arm 6, having' at its lower end a wiper T, arranged to swing' a short distance above the anvil-die s of. that is adapted to receive the article being` operated upon. Secured to the hammer 3 is astrap i), and a link IO connects the strap with the depending' arm 6.

The electing' means consists of an air-pipe Il, supported upon the base 1 through its connection with the stationary die and connected to a source Motl supply by means ot' a hose or other connection I2 and provided with a puppet-valve I3. having' a stem II projecting' therefrom which is adapted to contact with a hing'ed bar 15, secured to the basel below the said pipe. A sliding' bar I6 is supported on the'hammor 2% by means otl the projecting' lug's 1T and I8, secured thereto. The bar slides throug'h the lug's, and its downward movement is limited bythe nuts I9 at its upper end, and the nuts may be adjusted along' the bar to compensate t'or any ditl'erence in thickness otl the various dies that may be used and to reg'ulate its tripping` action upon the bar I5. A coiled spring' Q() surrounds the bar between the lug' VIT and a collar 2l, secured to the bar, and operates to cushion its movement when the hammer falls, and the bar, coming' in contact with the base, is caused to slide in its supports. The bar at its lower end is provided with a plate-spring' Q2, having' a hooked end 9.3, that eng'ag'es with the end ot' the hinged bar I5 and raises the said bar to open the valve throug'h contact with its stem when the hammer is raised, as shown by dotted lines in Fig'. 2. '.Ihe air-pipe l1 communicates with a passage Z-L, leading' beneath the die in the anvil and opening' into the bottom thereof, as shown in Fig'. 1l. The puppet-valve automatically shuts ott' the air-current, and it remains closed until the hammer falls and bring's the hook 23 in contact with the bar l5, which is raised thereby when the hammer has nearly reached its suspended position, and in being' raised it comes in contact with the stem ot' the valve and opens it and allows a blast ot air to escape through the pipe and connecting-passage beneath the article to eject it 'from the die. 'lhe hook Q3 is only eng'ag'ed with the bar I5 tln'oug'h a short portion ot its upward movement, as shown in Fig'. 2. As shown in Fig'. 3, the hammer is down and the hook Q3 is engaged with the plate-spring' '15. As the hammer is raised the bar I6 slides throug'h the lug's 17 and .I8 until stopped by the nuts 1S), as shown by dotted lines. Then the bar moves withthe hammer andopcns the valve to release the ai r-current.

IOO

What I claim, and desire to secure by Letters Patent, is

1. In a tool of the class described, the combination of a movable and a stationary die, an

air-conduit adapted to conduct air to the stationary die,and means connected with the hammer for automatically opening and closing said conduit at each stroke of thehammer.

2. In a tool of the class described, the combination of a movable and a stationary die, an air-conduit adapted to conduct air to the stationary die, a self-closing valve in said conduit, and means connected with said movable die for opening' said valve.

3. In a tool of the class described, the combination of a movable and a stationary die, an air-pipe connected with the stationary die, said pipe provided with a self-closing valve, a hinged bar adapted to open said valve when moved in one direetion, and means connected with the movable die for moving said hinged bar as the movable die" is being raised to its suspended position.

4. In a tool of the class described, the combination of a movable and a stationary die, an air-pipe connected with the stationary die, said pipe provided with a self-closing valve, a bar hinged to a fixed part of the machine and adapted to open said valve when mov-ed in one direction, a yielding hook connected with the movable die and arranged to engage with one end of the hinged bar when the movable die is down and to first raise said hingebar and then to be disengaged therefrom as said die is moved toits suspended position.

5. In a tool of the class described, the combination of a movable and a stationary die, an airpipe connected with the stationary die, said pipe provided with a self-closing valve, a bar hinged to a fixed part of the machine and adapted to open said valve when moved in one direction, a sliding bar moving with the movable die supported thereby and portions arranged to contact with said supports to limit its movement, a spring-hook secured to said sliding bar and adapted to engage with one end of the hinged bar when the movable die is down and to first raise said hinge-bar and then to be disengaged therefrom as said die is moved to its suspended position.

6. In a tool of the class described, the cornbination of a stationary die supported upon the base and provided with an air-duct communicating with a source of supply, a -rnovable die carried by the hammer, a self-closing valve adapted to control said air-supply, means for opening said valve comprising in part an adjustable bar adapted to slide through supports carried by the hammer and provided with a hooked end and portions arranged to contact with said supports to limit its movement, and a make-and-break connection between the said hooked end of the bar and valve.

7. In a tool of the class described, the combination of a stationary die supported upon the base and provided with an air-duct communicating with a source of supply, a movable die carried bythe hammer, a self-closing valve adapted to control said air-sup ply, means for opening said valve comprising in part an adjustable bar adapted to slide through supports carried by the hammer and provided with ahooked end, a means for cushioning the downward stroke of the bar, and a make-andbreak connection between the said hooked end of the bar and valve.

8. In a tool of the class described, the combination of a stationary die supported upon the base and adapted to receive the article to be operated upon, and provided with an airduct within said die communicating with a source of supply and terminating beneath the article, a movable hammer carrying the other die, and a make-and-break connection in the source of supply and means whereby said make-and-break connection is controlled by the movable hammer.

9. In a tool of the class described, the combination of a stationary die supported upon the base, a movable die carried by the hammer, the stationary die provided with an airduct communicating with a source of supply, a self-closing valve in said source of supply, a movable hammer and a die carried by said hammer, a bar pivoted on the base and adapted to contact with said valve in a manner to open it when moved in one direction, and means for moving said bar comprising an upright sliding adjustable bar connected with thehammer and controlled thereby, said bar provided with a yielding hook adapted to engage with the valve-opening bar in its downward movement and to first raise said hinge-bar and then to be released therefrom during a portion of its upward movement, and a coiled spring surrounding the sliding bar adapted to cushion its stroke.

In witness whereof Ihereto affix my signature in presence of two witnesses.

ROBERT FALCONER MASSA. l/Vitnesses:

CHAs. H. ROCHEFORT, T. H. ALFREDS. 

